#include <bits/stdc++.h>

using namespace std;




class Node {
public:
    int val;
    vector<Node*> neighbors;
    
    Node() {
        val = 0;
        neighbors = vector<Node*>();
    }
    
    Node(int _val) {
        val = _val;
        neighbors = vector<Node*>();
    }
    
    Node(int _val, vector<Node*> _neighbors) {
        val = _val;
        neighbors = _neighbors;
    }
};


class Solution {
public:
    Node* cloneGraph(Node* node) {
        
    }
};


int main(){




    return 0;
}